The 3 way PVC elbows on this page will fit sch 40, Sch 80, Class 200, Class 315, co-extruded furniture pipe and any other IPS-sized PVC pipe, plumbing grade or furniture grade. If you want to use the 1/2" and 3/4" 3 way PVC pipe fittings on this page (which are all referred to as IPS or Sch 40 fittings) with CTS (the cream color CPvC pipe) you can use CPVC CTS to PVC IPS adapters.